| Office files can save graphic files in Portable Network Graphics (PNG) format to improve the quality of the graphics when documents are saved as web pages. The PNG graphic file format (.png) is used for a wide range of graphics, from small images (such as bullets and banners) to complex images (such as photographs), and can offer better image fidelity and smaller file sizes than some other formats. However, PNG graphics cannot be displayed by many earlier web browsers, such as Microsoft Internet Explorer version 5 or earlier.
Office applications do not save graphics in the PNG format by default but can be configured to save in PNG format by explicitly enabling this setting.
By disabling this setting, future zero-day attacks that target PNG files will be thwarted. |
